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Multi-hop cognitive radio network architecture and deployment method

A cognitive radio and network architecture technology, applied in the field of cognitive radio networks, can solve the problems of robustness that needs further research, lack of centralized entities for obtaining global information, etc., to avoid broadcast storms, reduce deployment costs, and reduce time complexity. degree of effect

Inactive Publication Date: 2015-09-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] [Purpose of the invention]: Most of the existing research results are based on theoretical assumptions, especially the centralized algorithm lacks a centralized entity to obtain global information, and the existing test beds are also carried out in a reduced network environment. Stability and robustness need to be further studied. In order to solve the problems of common control channel, multi-hop routing and hidden terminals in the multi-hop cognitive radio network deployment process, the present invention introduces the SDN in the multi-hop cognitive radio network. architecture, and disclosed the specific implementation process

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  • Multi-hop cognitive radio network architecture and deployment method

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Embodiment Construction

[0026] The cognitive wireless mesh network based on SDN is different from the existing centralized control method. The existing centralized control only transmits global information, and the control of the network cannot meet the dynamic requirements. The SDN architecture has moved from wired to wireless , the wireless SDN architecture is actually deployable, and has extensive advantages in management, configuration, update, etc. The present invention applies the SDN architecture to the cognitive radio environment with dynamic spectrum changes, which not only fully utilizes the SDN control and forwarding separation, flexible and programmable characteristics, but also successfully solves the practical challenges of the cognitive radio network.

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0028] Such as figure 1 As shown, the entire network includes three entities, the one marked with "C"...

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Abstract

The invention discloses a multi-hop cognitive radio network architecture and a deployment method. Directing at the characteristic of a dynamic change of spectrum resources of a radio network and problems existing in actual deployment, the thought of separating SDN control and forwarding and a multi-hop radio network are combined, the architecture consists of a controller and multi-hop cognitive radio nodes, the controller is in charge of collecting global information and issues control information to each cognitive radio node through an OpenFlow protocol, the nodes have functions of cognitive radio and mesh nodes at the same time, and transmitting power can be adjusted. Environmental information and control information between the controller and the cognitive radio nodes are transmitted through a public control channel, and the invention provides a method for establishing the public control channel for actual deployment.

Description

technical field [0001] The invention belongs to the field of cognitive radio networks, and in particular relates to the architecture and deployment method of a multi-hop communication network. Background technique [0002] In recent years, wireless devices have grown rapidly, and wireless applications have become more and more abundant. This has put forward a huge demand for wireless network capacity. However, the fixed spectrum allocation scheme can no longer meet this rapidly growing demand. The opportunistic spectrum of cognitive radio The use of technology has brought hope to alleviate the shortage of spectrum resources. However, due to the characteristics of dynamic spectrum changes, the actual deployment of cognitive radio networks has become a huge challenge. The actual deployment has not been well solved in the research of cognitive radio networks. There are several issues affecting stability and feasibility. First, the common control channel problem. Existing resea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18
Inventor 陈兵沈宏钱红燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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